WO2022004972A1 - Module de batterie comprenant un élément de dissipation de chaleur, et procédé de fabrication d'élément de dissipation de chaleur - Google Patents

Module de batterie comprenant un élément de dissipation de chaleur, et procédé de fabrication d'élément de dissipation de chaleur Download PDF

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Publication number
WO2022004972A1
WO2022004972A1 PCT/KR2020/017427 KR2020017427W WO2022004972A1 WO 2022004972 A1 WO2022004972 A1 WO 2022004972A1 KR 2020017427 W KR2020017427 W KR 2020017427W WO 2022004972 A1 WO2022004972 A1 WO 2022004972A1
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WIPO (PCT)
Prior art keywords
battery module
heat dissipation
heat sink
hole
plate
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Application number
PCT/KR2020/017427
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English (en)
Korean (ko)
Inventor
조영범
신은규
유재민
김승준
Original Assignee
주식회사 엘지에너지솔루션
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Application filed by 주식회사 엘지에너지솔루션 filed Critical 주식회사 엘지에너지솔루션
Priority to EP20943108.9A priority Critical patent/EP4007043A4/fr
Priority to AU2020456793A priority patent/AU2020456793A1/en
Priority to US17/639,193 priority patent/US11978876B2/en
Priority to JP2021545909A priority patent/JP7282902B2/ja
Priority to CN202080050356.XA priority patent/CN114128012A/zh
Publication of WO2022004972A1 publication Critical patent/WO2022004972A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6567—Liquids
    • H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14008—Inserting articles into the mould
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6551—Surfaces specially adapted for heat dissipation or radiation, e.g. fins or coatings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6554—Rods or plates
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6567—Liquids
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/211—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for pouch cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
    • H01M50/24—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries from their environment, e.g. from corrosion
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
    • A62C3/16—Fire prevention, containment or extinguishing specially adapted for particular objects or places in electrical installations, e.g. cableways
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
    • H01M10/647—Prismatic or flat cells, e.g. pouch cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2200/00—Safety devices for primary or secondary batteries
    • H01M2200/10—Temperature sensitive devices
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/10—Batteries in stationary systems, e.g. emergency power source in plant
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/30—Batteries in portable systems, e.g. mobile phone, laptop
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • the present invention relates to a battery module including a heat dissipation member and a method of manufacturing the heat dissipation member, and specifically, a heat dissipation member having a through hole formed therein to prevent thermal runaway phenomenon by directly injecting water into an ignited battery cell. It relates to a battery module and a method of manufacturing the heat dissipation member comprising a.
  • a lithium secondary battery capable of charging and discharging is suitable for use as a built-in battery cell because it does not require replacement of the battery cell, and the stability improvement and capacity increase of the lithium secondary battery are rapidly improving, and thus it is applied to various devices.
  • the lithium secondary battery is widely used as an energy source for a wireless mobile device, which is a multifunctional small product, or a wearable device worn on the body. It is also used as an energy source or power storage system (ESS) for electric and hybrid electric vehicles, which are suggested as an alternative to gasoline and diesel vehicles.
  • ESS energy source or power storage system
  • the lithium secondary battery is used as an energy source of large capacity and high output, the problem of securing the safety of the lithium secondary battery is an important subject of interest.
  • the power storage device uses a method of injecting water into a battery module or battery pack by using a separate water injection device when a fire occurs in a battery cell accommodated therein.
  • a method of blocking heat transfer between battery cells or cooling a ignited battery cell may be used.
  • Patent Document 1 relates to an automatic fire extinguishing device for an energy storage system, in which one side of the connection line is connected and fixed, and high-pressure carbon dioxide is supplied to the inside of the fire extinguishing line in a no-power manner without applying a separate power source. Since it includes a carbon dioxide supply unit configured to include a compressed and stored carbon dioxide supply member, Patent Document 1 requires a separate configuration of a fire extinguishing line, a carbon dioxide supply member, etc., so it does not solve the problem of increasing the size of the power storage device. can't
  • Patent Document 2 includes a reservoir for a fire extinguishing agent and a conduit means for guiding the fire extinguishing agent, wherein the conduit means is a vent emitted from a vent hole formed in any one of a plurality of battery cells to collide with a gas jet and wherein the conduit means is for a cell system configured to be melted by the vent-gas jet.
  • the battery system of Patent Document 2 is provided with a storage for storing the extinguishing agent and a conduit means for guiding the extinguishing agent, and the problem of increasing the volume of the battery system is still not solved.
  • Patent Document 1 Korean Patent Publication No. 19984817 (2019.05.27)
  • Patent Document 2 Korean Patent Publication No. 2019-0085005 (2019.07.17)
  • the present invention is to solve the above problems, and in order to prevent the transfer of thermal energy to adjacent battery cells when the battery cell is ignited or exploded, a battery cell in which a refrigerant for a heat dissipation member provided inside the battery module is ignited
  • An object of the present invention is to provide a battery module including a heat dissipation member having a structure that is directly injected into the cells and a method of manufacturing the heat dissipation member.
  • a battery module according to the present invention for achieving this object is combined with a battery cell stack in which a plurality of pouch-type battery cells are stacked, a battery module housing accommodating the battery cell stack, and a part of the battery module housing
  • the heat dissipation member may have a structure in which a through hole is formed in a heat sink facing the battery cell stack, and a sealing member is added to the through hole.
  • the battery module housing includes an upper plate and a lower plate
  • the heat dissipation member includes a heat sink and a refrigerant flowing portion
  • a refrigerant flowing portion is formed between the upper plate and the heat sink.
  • the upper plate and the heat sink may be combined.
  • the heat dissipation member may be coupled to the lower plate and the heat sink in a form in which a refrigerant flowing portion is formed between the lower plate and the heat sink.
  • the sealing member may be made of a material melted by a high-temperature gas or sparks emitted from the pouch-type battery cell.
  • the through-hole may be opened by melting of the sealing member, and a refrigerant may be injected into the pouch-type battery cell through the through-hole.
  • the refrigerant may be cooling water, and the cooling water may not contain a combustible material.
  • a flow path for guiding the flow of the cooling water may be formed in the upper plate and the lower plate.
  • the battery module housing includes an upper plate and a lower plate, and a water tank is coupled to the inner surface of the upper plate as the heat dissipation member, and in the water tank, the inner surface of the upper plate A through hole is formed on the second surface facing the first surface coupled to the through hole, and a sealing member may be added to the through hole.
  • the battery module housing includes an upper plate and a lower plate, and a water tank is coupled to the inner surface of the lower plate as the heat dissipation member, and in the water tank, it is coupled to the inner surface of the lower plate.
  • a through hole may be formed on a second surface facing the first surface, and a sealing member may be added to the through hole.
  • the through hole is formed at a position where the supply of cooling water to the ignited pouch-type battery cell is possible even if any pouch-type battery cell ignites, and the number and size of the pouch-type battery cell Accordingly, the number of the through-holes may be determined.
  • the sealing member fills the through hole, and may include an extension further extending outwardly from the periphery of the through hole on the inner and outer surfaces of the heat sink.
  • a groove may be formed in a portion where the extension portion is formed.
  • the vertical cross-section of the heat sink in which the groove is formed may be formed in any one or more shapes selected from the group consisting of polygons, semi-circles, and semi-ovals.
  • the present invention also provides a method of manufacturing a heat dissipation member included in the battery module.
  • the method of manufacturing the heat dissipation member includes the steps of (a) arranging a flat plate for a heat sink of the heat dissipation member between a die and a holder, (b) punching the flat plate to form a through hole to manufacture a heat sink, (c) ) mounting the heat sink to a mold for insert extrusion molding, (d) fixing the heat sink to the mold and injecting a resin for a sealing member, and (e) removing the mold and a heat sink to which a sealing member is added and collecting, a protrusion for forming a groove in the heat sink may be formed on the die and the holder.
  • the heat dissipation plate may be coupled to an upper plate and a lower plate of the battery module housing with a separation space therebetween, and a refrigerant flow portion through which a refrigerant flows in and out may be formed in the separation space.
  • the heat dissipation plate constitutes a water tank coupled to the upper and lower plates of the battery module housing, and the other side facing one side of the water tank coupled to the upper and lower plates.
  • the heat sink may be disposed on the.
  • FIG. 1 is a perspective view of a battery module according to the present invention.
  • FIG. 2 is a vertical cross-sectional view of a battery module according to an embodiment.
  • FIG 3 is a perspective view and a plan view of a disassembled state of the heat dissipation member according to the present invention.
  • FIG. 4 is a plan view of a heat sink according to the present invention.
  • FIG. 5 is a partially enlarged view of FIG. 2 .
  • FIG. 6 is an enlarged vertical cross-sectional view of a battery module in which a sealing member is added to a grooved heat sink.
  • FIG. 7 is a vertical cross-sectional view illustrating a state in which a sealing member is added to a grooved heat sink.
  • FIG. 8 is a vertical cross-sectional view of a battery pack according to another exemplary embodiment.
  • FIG. 10 is a front view schematically illustrating a process of adding a sealing member to a heat sink.
  • FIG. 1 is a perspective view of a battery module according to the present invention.
  • the battery module 100 includes a battery module housing accommodating a battery cell stack in which a plurality of pouch-type battery cells 101 are stacked, and an upper surface of the battery cell stack. and a heat dissipation member disposed on the lower surface.
  • bidirectional pouch-type battery cells 101 As a plurality of pouch-type battery cells 101, bidirectional pouch-type battery cells 101 in which the electrode leads 102 protrude in opposite directions are shown in FIG. It goes without saying that unidirectional pouch-type battery cells protruding in the same direction may be used.
  • the battery module housing is disposed between the upper plate 110 disposed on the upper part of the battery cell stack, the lower plate 120 disposed under the battery cell stack, and the upper plate 110 and the lower plate 120 . and a side plate 130 disposed on a side surface of the battery cell stack.
  • an end plate (not shown) is coupled to the upper plate 110 , the lower plate 120 and the side plate 130 on the outside in the direction in which the electrode lead 102 of the pouch-type battery cells 101 protrudes.
  • a housing of the battery module may be assembled.
  • the shape of the battery module housing is not limited to the structure shown in FIG. 1 , and unlike that shown in FIG. 1 , the battery module housing may be a monoframe type or a U frame type frame.
  • FIG. 2 is a vertical cross-sectional view of a battery module according to an embodiment.
  • a battery cell stack in which a plurality of pouch-type battery cells 101 are stacked is accommodated in a battery module housing including an upper plate 110 and a lower plate 120 .
  • the heat dissipation member 200 includes a heat dissipation plate 210 and a refrigerant flow unit 220 through which refrigerant flows in and out.
  • the heat sink 210 is coupled to the upper plate 110 with a spacing therebetween, and the space formed by the spacing becomes the refrigerant flow part 220 . Accordingly, the upper plate 110 , the heat sink 210 , and the refrigerant flow unit 220 have an integrated structure.
  • the heat dissipation member 200 is integrally coupled to the upper plate 110 and is located on the upper part of the battery cell stack.
  • the heat dissipation member 200 ′ includes a heat dissipation plate 210 and a refrigerant flow unit 220 through which refrigerant flows in and out.
  • the heat sink 210 is coupled to the lower plate 120 with a spacing therebetween, and the space formed by the spacing becomes the refrigerant flow unit 220 . Accordingly, the lower plate 120 , the heat sink 210 , and the refrigerant flow unit 220 have an integrated structure.
  • the heat dissipation member 200 ′ is integrally coupled to the lower plate 120 and is positioned under the battery cell stack.
  • a through hole 230 is formed in the heat sink 210 , and a sealing member 240 is added to the through hole 230 .
  • the sealing member 240 is made of a material that is melted by a high-temperature gas or sparks emitted from the pouch-type battery cell 101 . That is, in a normal state like the pouch-type battery cell 101, the sealing member 240 seals the through-hole 230, but, like the pouch-type battery cell 103, when the temperature rises or fire occurs, it is sealed. The member 240 is melted to open the through hole 230 .
  • the refrigerant of the refrigerant flow unit 220 is directly injected into the pouch-type battery cell 103 through the opened through-hole. By such a process, it is possible to quickly prevent thermal runaway from expanding by rapidly cooling the overheated or ignited pouch-type battery cell.
  • the sealing member is a material that is melted in a high-temperature gas or spark ejected by venting of a pouch-type battery cell having an increased temperature, and a thermoplastic polymer resin having a melting point of about 200 ° C. or less may be applied, for example.
  • a thermoplastic polymer resin materials having a melting point of about 100° C. or more and 200° C. or less, such as polyethylene and polypropylene, may be used.
  • the additive contained in the cooling water does not contain a combustible material.
  • the amount of the additive is enough to prevent secondary explosion of the pouch-type battery cell, and at the same time, it is used as an antifreeze to prevent freezing of the coolant.
  • the heat dissipation member 200 of FIG. 2 is a form in which the heat dissipation plate is combined with the upper plate, and the heat dissipation member 200 ′ has all configurations except that the heat dissipation plate is coupled to the lower plate. Since the same can be applied, the following description will be made based on the heat dissipation member 200 .
  • FIG 3 is a perspective view and a plan view of a disassembled state of the heat dissipation member according to the present invention.
  • FIG. 3 a perspective view of a state in which the heat sink 210 is removed in order to explain the internal structure of the heat radiation member in the heat radiation member to which the upper plate 110 and the heat sink 210 are coupled is shown in (a). and a plan view of the heat sink 210 is shown in (b).
  • a partition wall 215 for guiding the flow of cooling water used as a refrigerant is formed on the upper plate 110 , and a flow path is formed between the partition walls 215 .
  • the cooling water inlet and cooling water outlet indicated by arrows are formed adjacent to the outer periphery of one side of the upper plate 110, and the cooling water inlet and the cooling water outlet are formed in the center of the outer periphery of one side in the width direction (a) of the upper plate.
  • the temperature deviation of the entire cooling water flowing through the refrigerant flowing portion may be small. Accordingly, in the case of forming the flow path having such a shape, uniform heat dissipation can be exhibited in the entire portion of the heat dissipation member.
  • 3B shows a state in which the through hole 230 is formed in the heat sink 210 .
  • the through holes 230 having a circular shape on a plane are arranged to be spaced apart from each other at regular intervals along the horizontal and vertical directions.
  • a through hole should be formed at a position where cooling water can be supplied to the ignited pouch-type battery cell. That is, it is preferable that at least one through-hole is disposed in all pouch-type battery cells so that cooling water can be supplied to all pouch-type battery cells. Accordingly, the number and spacing of the through-holes may be adjusted according to the number and size of the pouch-type battery cells.
  • FIG. 4 is a plan view of a heat sink according to the present invention.
  • the shape of the through holes 230 ′ and 230 ′′ formed in the heat sink 210 is different from the shape of the through hole 230 of FIG. 3 .
  • one through hole 230 ′ has one through hole and two or more pouch-type battery cells. They are formed obliquely to cover the battery cells, and the through hole 230 ′′ is formed in a direction perpendicular to the longitudinal direction L of the battery cells to cover two or more pouch-type battery cells.
  • FIG. 5 is a partially enlarged view of FIG. 2 .
  • a refrigerant flow portion 220 is formed between the heat sink 210 and the upper plate 110 , and a partition wall 215 is formed between the coolant flow portions 220 , A flow path of the refrigerant is formed by this.
  • a space may be generated between the battery cell stack and the heat sink 210 , and for each individual battery cell 101 , a deviation may occur in the distance between the battery cell and the heat sink 210 .
  • the heat dissipation property of discharging the heat inside the battery module to the outside of the battery module is reduced by the space formed between the battery cell stack and the heat sink 210 .
  • a thermal interface material (TIM) 390 may be filled in a space between the battery cell stack and the heat sink 210 .
  • the heat transfer material 390 widens the thermal contact between the battery cell stack and the heat sink, thermal energy generated from the battery cell stack can be rapidly discharged into the battery module.
  • the sealing member may not reach the melting temperature. Accordingly, the addition of the heat transfer material may be omitted.
  • the heat transfer material may not be formed under the through hole of the heat sink and may be added only to other portions. In this case, even if a heat transfer material is added, the thermal energy of the vented battery cell may be directly transferred to the sealing member without loss, and the sealing member may be melted to supply the refrigerant to the vented battery cell.
  • a sealing member 240 is added to the through hole 230 penetrating the heat sink 210, for example, the sealing member 240 fills the through hole 230, and the inner surface of the heat sink ( 211) and an extension 241 that further extends outwardly around the through hole 230 on the outer surface 212 of the heat sink.
  • the sealing member 240 Since the extension portion 241 is formed in the sealing member 240 , the sealing member 240 is removed by the pressure of the coolant flowing through the refrigerant flowing portion, thereby preventing the through-hole from being opened.
  • FIG. 6 is an enlarged vertical cross-sectional view of a battery module in which a sealing member is added to a grooved heat sink.
  • the refrigerant flowing part 320 is formed between the upper plate 110 and the heat sink 310 , and a sealing member 340 is added to the through hole of the heat sink 310 .
  • the sealing member 340 includes an extension part 341 , and a groove 314 is formed in a portion where the extension part 341 is formed among the inner surface 311 and the outer surface 312 of the heat sink.
  • a portion of the sealing member constituting the extended portion 341 is inserted into the groove 314 to form the insertion portion 345 , and the sealing member is removed by the water pressure of the coolant to more effectively prevent the opening of the through hole can do.
  • the sealing member including the extension part In order to manufacture the sealing member including the extension part as described above, an insert injection method in which a resin for the sealing member is imported and manufactured for the heat sink in which the groove is formed may be used.
  • the portion passing through the through hole of the sealing member prepares a central portion of the sealing member having a shape and size corresponding to the shape and size of the through hole, and an extension is formed by adding a separate member to the central portion of the sealing member.
  • the coupling method of the extension part added separately from the central part of the sealing member is not limited, such as bonding by an adhesive material, screw fastening, and force fitting method.
  • the central portion of the sealing member may be made of a thermoplastic polymer resin that is melted at a high temperature
  • the material of the separately added extension part may be made of a material that does not melt at a high temperature.
  • FIG. 7 is a vertical cross-sectional view illustrating a state in which a sealing member is added to a grooved heat sink.
  • sealing members 440 , 540 , and 640 are added to each of the heat sinks 410 , 510 , and 610 .
  • Each of the heat sinks 410, 510, and 610 has grooves 414, 514, and 614 formed in portions meeting the extension, and inserts 445. 545. 645 in the grooves 414, 514, 614. this is formed
  • the vertical cross-section of the portion in which the grooves 414, 514, 614 are formed in the heat sink (410, 510, 610) is in any one or more shapes selected from the group consisting of polygons, semi-circles, and semi-ellipses including triangles, trapezoids, etc. may be formed, and they may be formed by mixing.
  • the thickness of the central portion 641 of the sealing member 640 is thinner than the thickness of the central portion of the sealing member 410 and the thickness of the central portion of the sealing member 510 .
  • the thickness of the portion sealing the through-hole is formed to be relatively thin, the time until the sealing member is melted and the through-hole is opened can be shortened, so that the refrigerant can be quickly supplied to the battery cell. .
  • FIG. 8 is a vertical cross-sectional view of a battery pack according to another exemplary embodiment.
  • the battery module housing includes an upper plate 110 ′ and a lower plate 120 ′, and a battery cell stack in which pouch-type battery cells 101 are stacked is accommodated.
  • a water tank 260 functioning as a heat dissipation member is coupled to the inner surface of the upper plate 110 ′.
  • the water tank 260 includes a first surface 261 coupled to the inner surface of the upper plate 110 ′, and a second surface 263 facing the first surface 261 , and the first surface 261 . ) and the cooling water 262 is accommodated in the space formed between the second surface 263 .
  • a through hole 267 is formed in the second surface 263 , and a sealing member 268 is added to the through hole 267 .
  • the sealing member 268 is made of a material that is melted in the high-temperature gas or sparks released by the pouch-type battery cell 101 open. When the pouch-type battery cell is heated or ignited, the sealing member 268 melts and penetrates. When the sphere 267 is opened, cooling water 262 is directly injected into the ignited pouch-type battery cell 101 so that the ignited pouch-type battery cell can be cooled and extinguished.
  • the water tank 260' includes a first surface 261' coupled to the inner surface of the lower plate 120', and a second surface 263' facing the first surface 261', the first The cooling water 262' is accommodated in the space formed between the surface 261' and the second surface 263'.
  • a through hole 267' is formed in the second surface 263', and a sealing member 268' is added to the through hole 267'.
  • FIG. 9 is a front view schematically illustrating a manufacturing process of the heat sink
  • FIG. 10 is a front view schematically illustrating a process of adding a sealing member to the heat sink.
  • the method for manufacturing the heat dissipation member includes the steps of (a) arranging a flat plate for a heat sink of the heat dissipation member between a die and a holder, (b) punching the flat plate using a punching machine to form a through hole to manufacture a heat sink Step, (c) mounting the heat sink to a mold for insert extrusion molding, (d) fixing the heat sink to the mold and injecting a resin for a sealing member, and (e) removing the mold and sealing member and collecting the added heat sink, and protrusions for forming grooves in the heat sink may be formed on the die and the holder.
  • FIG. 9 and 10 show a process of manufacturing the heat sink 410 shown in FIG. ) and the holder 720 , and punching using a punching machine 730 at a position where the through hole is to be formed to form the through hole, the heat sink 410 may be manufactured.
  • the cut portion 217 cut by the puncher 730 is removed.
  • Protrusions 711 and 721 are formed in each of the die 710 and the holder 720 , and grooves 414 having a size corresponding to the shapes of the protrusions 711 and 721 are formed in the heat sink 410 .
  • an insert extrusion molding method may be used, and the heat sink 410 is disposed between the upper frame 801 and the lower frame 802 . Thereafter, the resin 447 for the sealing member is injected through the injection hole 811 formed in the upper frame 801 .
  • the heat sink 410 to which the sealing member 440 is added is formed in the form of an inner space formed between the upper frame 801 and the lower frame 802 . Since a portion of the sealing member is inserted into the heat sink 410 into the groove 414 , the sealing member 440 can be stably fixed to the heat sink 410 .
  • the heat dissipation plate manufactured in this way is coupled to the upper plate and the lower plate of the battery module housing with a space therebetween, so that a heat dissipation member having a structure in which a refrigerant flows in and out of the space can be manufactured.
  • the heat sink may constitute a water tank coupled to the upper plate and the lower plate of the battery module housing, and the heat sink may constitute the other side facing one side of the water tank coupled to the upper plate and the lower plate.
  • sealing member 240, 268, 268', 340, 440, 540, 640: sealing member
  • the battery module according to the present invention can rapidly cool a ignited battery cell by changing the structure of a heat dissipation member used in the past without adding a separate additional configuration, thereby increasing the volume of the battery module It is possible to reliably suppress the thermal runaway phenomenon of the battery cell while minimizing the
  • the coolant is directly injected from the heat dissipation member to the battery cell, so that the temperature of the battery cell can be quickly lowered.
  • the weight increase of the battery module can be minimized despite the addition of a fire extinguishing structure.
  • the heat dissipation member is used to inject a refrigerant thereto.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Battery Mounting, Suspending (AREA)
  • Secondary Cells (AREA)

Abstract

La présente invention concerne un module de batterie et un procédé de fabrication d'un élément de dissipation de chaleur, le module de batterie comprenant : un empilement d'éléments de batterie dans lequel une pluralité d'éléments de batterie de type poche sont empilés ; un boîtier de module de batterie destiné à recevoir l'empilement d'éléments de batterie ; et l'élément de dissipation de chaleur étant formé pour être couplé à une partie du boîtier de module de batterie, l'élément de dissipation de chaleur ayant un trou traversant formé dans une plaque de dissipation de chaleur faisant face à l'empilement d'éléments de batterie, et un élément d'étanchéité étant disposé dans le trou traversant. L'expansion de volume du module de batterie peut être réduite au minimum, et l'emballement thermique d'un élément de batterie allumé peut être efficacement empêché.
PCT/KR2020/017427 2020-06-29 2020-12-02 Module de batterie comprenant un élément de dissipation de chaleur, et procédé de fabrication d'élément de dissipation de chaleur WO2022004972A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP20943108.9A EP4007043A4 (fr) 2020-06-29 2020-12-02 Module de batterie comprenant un élément de dissipation de chaleur, et procédé de fabrication d'élément de dissipation de chaleur
AU2020456793A AU2020456793A1 (en) 2020-06-29 2020-12-02 Battery module comprising heat dissipating member, and method for manufacturing heat dissipating member
US17/639,193 US11978876B2 (en) 2020-06-29 2020-12-02 Battery module including heat dissipation member and method of manufacturing the heat dissipation member
JP2021545909A JP7282902B2 (ja) 2020-06-29 2020-12-02 放熱部材を含む電池モジュール及び前記放熱部材の製造方法
CN202080050356.XA CN114128012A (zh) 2020-06-29 2020-12-02 包括散热构件的电池模块和制造该散热构件的方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2020-0079312 2020-06-29
KR1020200079312A KR20220001227A (ko) 2020-06-29 2020-06-29 방열부재를 포함하는 전지모듈 및 상기 방열부재의 제조방법

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WO2022004972A1 true WO2022004972A1 (fr) 2022-01-06

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Country Status (7)

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US (1) US11978876B2 (fr)
EP (1) EP4007043A4 (fr)
JP (1) JP7282902B2 (fr)
KR (1) KR20220001227A (fr)
CN (1) CN114128012A (fr)
AU (1) AU2020456793A1 (fr)
WO (1) WO2022004972A1 (fr)

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WO2024064568A1 (fr) * 2022-09-21 2024-03-28 Viridi Parente, Inc. Cadre d'empilement et système de refroidissement pour éléments de batterie
EP4270598A3 (fr) * 2022-04-26 2024-04-03 STL Technology Co., Ltd. Dispositif de batterie ayant un mécanisme de protection thermique

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KR20230119770A (ko) * 2022-02-08 2023-08-16 주식회사 엘지에너지솔루션 배터리 랙 및 이를 포함하는 전력 저장 장치
KR20230124138A (ko) * 2022-02-17 2023-08-25 주식회사 엘지에너지솔루션 전지 팩 및 이를 포함하는 디바이스
WO2023171950A1 (fr) * 2022-03-10 2023-09-14 주식회사 엘지에너지솔루션 Dispositif comprenant un système de refroidissement
KR20230133621A (ko) * 2022-03-11 2023-09-19 주식회사 엘지에너지솔루션 배터리 팩 및 이를 포함하는 전력 저장 장치
KR20230154343A (ko) * 2022-04-29 2023-11-08 주식회사 엘지에너지솔루션 냉각성능이 강화된 배터리 팩
KR20230171395A (ko) * 2022-06-10 2023-12-20 주식회사 엘지에너지솔루션 배터리 팩 및 이를 포함하는 자동차
WO2024019473A1 (fr) * 2022-07-18 2024-01-25 주식회사 엘지에너지솔루션 Module de batterie et bloc-batterie comprenant une partie de refroidissement
WO2024019467A1 (fr) * 2022-07-18 2024-01-25 주식회사 엘지에너지솔루션 Module de batterie et bloc-batterie comprenant une unité de refroidissement
CN115332656A (zh) * 2022-08-23 2022-11-11 华为数字能源技术有限公司 电池箱体、电池模组、储能系统及电动汽车
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WO2024064568A1 (fr) * 2022-09-21 2024-03-28 Viridi Parente, Inc. Cadre d'empilement et système de refroidissement pour éléments de batterie

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JP7282902B2 (ja) 2023-05-29
KR20220001227A (ko) 2022-01-05
JP2022544429A (ja) 2022-10-19
US20220328906A1 (en) 2022-10-13
EP4007043A4 (fr) 2023-09-06
US11978876B2 (en) 2024-05-07
EP4007043A1 (fr) 2022-06-01
CN114128012A (zh) 2022-03-01
AU2020456793A1 (en) 2022-02-10

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